Former top cop Bill Bratton is seriously settling back into town. The chief and his TV-anchor wife, Rikki Klieman–who moved back from LA late last year — have rented an apartment on East 65th Street and bought a house in Hampton Bays. The couple was spotted at Hamp ton Sheet magazine publisher Joan Jedell‘s summer party at real-estate firm LaSeven’s East 58th Street space Tuesday night, rubbing shoulders with David Dinkins, Republican Senate hopeful Bruce Blake man, Sharon Bush, Russian millionaire Janna Bullock and architect Richard Meier.